When ____ to compare the education system of China and Britain, the professor gave no answer．
| A．ask | B．asking | C．asked | D．to ask |
___________lessons were not difficult.
| A．Our few first short English |
| B．Our first few short English |
| C．Our few first English short |
| D．Few our first English short |
The most favorite room is the tidy study with a fireplace,_____we can watch TV and enjoy the nice scenery outside.
| A．where | B．when | C．that | D．which |
I lost my way in complete darkness and, ______matters worse, it began to rain.
| A．made | B．having made | C．making | D．to make |
She had golden hair when she was a child, but_________ she got older and older; her hair went darker and darker.
| A．while | B．when | C．after | D．as |
___________she was invited to the ball made her very happy.
| A．What | B．That | C．When | D．Because |